The term "tartuffian" refers to a hypocritical and deceitful person who pretends to be virtuous or religious. Synonyms for this word include "hypocrite," "pharisee," "deceiver," "charlatan," "imposter," and "faker." Other similar words include "pretender," "poser," "fraud," "sham," "impostor," "quack," and "mountebank." These words all describe someone who puts on a false front in order to deceive others and gain personal advantage. Each of these synonyms has a slightly different nuance, but all share the common theme of fraudulent behavior. Whether in politics, religion, or everyday life, it's important to be aware of tartuffians and their devious tactics.